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No power Samsung flatscreen CRT 21 inch TV

Samsung flatscreen CRT 21 inch TV. STR in regulator area is good but they cannot power? what are the possible problem of this tv?

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  • Anonymous Mar 28, 2014

    How can i connect ps2 with my samsung Dine Jr 21 inch TV

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Check its fuse. Check the rectifier diodes. If you wish to get some details, check the site linked here. Pull up older posts. Check the site in 'Mosaic' view. It will make search easy. http://electronicshelponline.blogspot.com/

Posted on Jan 18, 2014

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6ya6ya

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Posted on Jan 02, 2017

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jo_chinmay

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SOURCE: Connecting Dell Precision Laptop to Samsung 29 inch Easy View (CRT) T.V

dear sir.

here u have to chek cable yr laptop is not support with a same s-cable u need to connecter for s-vadio to audio vedio connector and it's convort yr s-cable to comosite cable afer that it's automaticly dosply thru composet.... yeah one thing have to chek with different cable then selacet display propatise to set output setting is set in to s-video.. it's help u...:)


Thanks
please vote
jo_chinmay

Posted on Jan 02, 2009

Anonymous

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SOURCE: Samsung Plano 21

Hai
 My "Samsung Plano Dnie Jr Tv " is Screen Problem.Tv Display is Fully Blackish color and display center is One White Line will be come. 

Posted on Jan 04, 2010

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Dec 21, 2015 | Sony Televison & Video

1 Answer

Can you use a power cord from a Samsung 39 inch flat screen on a Samsung 65 inch flatscreen


yes, most tv's that i know of take two types of power cords, both of which are ok to mixmatch. As long as the new tv uses a molded u ground cable (3 holes on female end) or the smaller ones (2 round holes on female end) which most do it is perfectly safe to do so. As long as the tv did not have the box attached to cord ( regulates wattage) if that is the case you need one that supplies the EXACT wattage to the tv but i have yet to run into a tv that uses a power cord like that.

Feb 21, 2015 | Samsung Televison & Video

1 Answer

My china crt tv uses str w 6554 but has a fault in power when you fuse it with a bulb it blick the bulb bright.


Check the entire circuit around the STR for any faulty component/s; especially to used Zener diodes. You should check each component in the power regulator section circuit, before replacing an other STR. Any of the faulty components at its circuit, might damage the new STR too. Be care.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. Do a search by type in the brand name of your device at its search box and press "Enter".
http://electronicshelponline.blogspot.com/
Power supply regulator section circuits to some popular brand TVs are given. Search the site by the number of STR, used at your TV.

Jul 20, 2014 | Televison & Video

1 Answer

Samsung flatscreen CRT 21 inch TV. problem no power?


Check and replace damaged component/s at its main power regulator [SMPS] section circuit. If you wish to get some details, check the site linked here. Pull up older posts. Check the site in 'Mosaic' view. It will make search easy. http://electronicshelponline.blogspot.com/

Jan 18, 2014 | Samsung CW29M64NS 29" TV

1 Answer

What is the number of str ic,regulator power supply a 14 inches sharp tv. model primo sharp tv 14 inches


Try the site linked here. It has schematics of power supply section to many popular brand TVs. http://electronicshelponline.blogspot.com/ Hopes it will help you to check out the number of the STR.

Dec 18, 2013 | Televison & Video

1 Answer

Dear sir , i have sony trinitron kv2552 m9 crt 25 inch tv i need the transisters on that tv , is this the transister str 50115 on this tv please tell me.


It is not a transistor. It is an STR [Switching transistor Regulator]. Actually it is an IC, used at its power supply regulator section as main power switching regulator. Check this link to see its picture.

For more details type in this site name "Electro-help" (DO NOT copy and paste the site name from here. Doing so may lead you to wrong place) to search box of your search engine [not in the address bar of your browser], and press "Enter".

It is an electronic equipments service help site.

Note the position of hyphen in between words in site name. The site will appear as it is in web; subtitled as Service help to electronic home entertainment equipments.

Pull up older posts.

You can locate this site, either at the bottom part of first search page, or at the top of second.
Detailed descriptions are there to help you.

Sometimes, entering ads by the side and bottom of each post here might give you details of its availability and local price.

Jun 07, 2012 | Sony FD Trinitron KV-32HV600 32" TV

3 Answers

No Display, no sound- not working, showing dead. But input Power is ok. Picture tube filamment not getting power. model sony KV-2192M3


Hello
Check the input fuse first. If it is blown, there will be some short inside the power regulator circuit. Usually Sony sets uses STR regulated power supply. You can see this STR, and Ic, screwed onto a heatsink. Replace it with a same type and number. Before replacing the STR, check the diodes used in that section for damage, mainlu zener diodes. They might get shorted along the blowing of the STR. Check that section throughly before resoldering the new STR.
If any further assistance you needs, get me through Fixya. Ok.

Nov 27, 2010 | Sony FD Trinitron WEGA KV-21CL10 21" TV

1 Answer

In my tv fuse is blowing off immediately


Hello
If fuse blows off immediately, i means that there is a short circuit occured in your telivision. This can mainly due to some diodes or regulators inside your tv. An overvoltage, spikes, ie [sudden high rise and go low], in the supply votage in your home, could damage power supply regulator components inside your tv.
All Sony Tvs has high accuracy power regulating systems inside. It is an onboard assembly, usually take 1/4th of the area of the TV. In older Sony TVs, this section was built in with use of transistors of different types. But your tv is not so old, so its power supply system is built with an STR, an Ic meant only for power regulations. Normally it willb numbered STR S6707, STR S6703 etc; according th the working voltage of the main board, and screen size of the TV.
This STR may get shorted due to power fluctuations, or any other reasons. A I mentioned above this is an Ic look like small squuare biscut of about an inch in square, and will be black in colour.
The rectified main power supply is given to it via an SMPS transformer [Swiched Mode Transformer], and the Ic will swictch it on and off at the rate of sbout 25KHz or more, and this transformeres secondary voltage is used to power up the other part of the ciiruit board.
If the fuse is blowing as soon as the set is switched on, this Ic will be faulty [Shorted inside]. If you put an another fuse, it also will blow up due to short. It is not good to play with power supply system by doing this as it may harm to other components also.
You have done it I thinks. Here in India, we gets 220VAC as home power supply. Sony TVs used here have a fuse rateing of 250V 3.5Amps. If your household supply system voltage is also this you must put only this rated fuse. If it is 110 or 120VAC, the fuse rating may differ; and will go upto 6 to7 Amps. More than this rated fuse should not be used.
You just do one thing. Just open the back cover of the TV, locate the power regulator section, and chech whether any main rectifier diodes for leak. There may four of them. In some sony Tvs, rectifier stalks are used. Check it for leak. If thery are all good, measure the resistance across the main filter capacitor with a multimeter set in Ohms range. If the STR said above is short, the meter will give full scale deflection. Unsoder the STR and pick it out after loosing its fixing screws to the heat sink. Again check the resistance accross the main filter capacitor. It must sho a low deflection or no deflection at all. Never replace the STR with a new one as there may be some other faulty components in that section. Usually when STR fails, there are some Zener diodes, Wire wound resistor etc will also gets shrted. If you replce the STR before checking them for fault, the STR you puts in will get shorted as you swich on the set. It will take just 1/100 part of a second.
So check all the components related with power regulator system, and then only repace the regulator. Caution: Keep chlidren away from you while you open the tv. Never touch any part of the circuit board while power supply is there. Plug out from the wall socket each time you touch the printed circuit board. As your Tv screen size is 32", an approximate of 25KVDC [15,000VDC], will be present at the first anode of the picture tube while it is working. It is too dagerous to contact.
If you haven't through knoledge, skill and patience, never try to repair it. If you knows to follow its schematic digram, buy one book and follow the circuit.
Keep an adult beside you as you try to repair your set, as a precaution.
If you have any doubt, report to Fixya, they will give me alert. Ok

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1 Answer

When we will give the power to TV, fuse & R502 location resistor burn.


damage can be ascertained from the power regulator, you can check the transistor / STR power regulator, and Diode Bridge (AC-DC), check the Positive and Negative on Elco 220/450 volt power regulator, is there a short circuit? if no, probably from before entering the diode, it can be from thermistor. Hopefully help

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1 Answer

Dead KONKA 21 inch TV


try Check first all the output voltage in the secondary of the chopper transformer if regular voltage acquire. check secondary switching circuit feedback towards the opto isolator and syscon.
Assuming that HOT is OK.

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